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Dataset Title:  Sulfur Near Edge X-ray Fluorescence Spectroscopy Data for standard materials Subscribe RSS
Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_756682)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Energy {
    Float64 _FillValue NaN;
    Float64 actual_range 2462.95, 2512.95;
    String bcodmo_name "unknown";
    String description "X-ray energy";
    String long_name "Energy";
    String units "electron volts";
  }
  Ammonium_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00651, 2.9953469;
    String bcodmo_name "count";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Mole Concentration Of Ammonium In Sea Water";
    String units "x-ray fluorescence counts";
  }
  Barite {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00205, 1.4496355;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Barite";
    String units "x-ray fluorescence counts";
  }
  Copper_II_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00241, 1.8524978;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Copper II Sulfate";
    String units "x-ray fluorescence counts";
  }
  Gypsum {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00256, 2.0457804;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Gypsum";
    String units "x-ray fluorescence counts";
  }
  Iron_Ammonium_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.0229, 1.6765362;
    String bcodmo_name "count";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Mole Concentration Of Ammonium In Sea Water";
    String units "x-ray fluorescence counts";
  }
  Iron_III_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00876, 2.6487011;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Iron III Sulfate";
    String units "x-ray fluorescence counts";
  }
  Jarosite {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00578, 2.1202962;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Jarosite";
    String units "x-ray fluorescence counts";
  }
  Magnesium_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00785, 1.6286722;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Magnesium Sulfate";
    String units "x-ray fluorescence counts";
  }
  Potassium_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.00713, 1.5300749;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Potassium Sulfate";
    String units "x-ray fluorescence counts";
  }
  Sodium_Sulfate {
    Float64 _FillValue NaN;
    Float64 actual_range -0.0139, 2.0601661;
    String bcodmo_name "count";
    String description "Name of sulfur standard or mineral analyzed. Units (x-ray fluorescence counts) are normalized to incoming radiation.";
    String long_name "Sodium Sulfate";
    String units "x-ray fluorescence counts";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"Methodology: The sulfur standards were ground using an agate mortar and pestle
to the consistency of a fine talcum powder (approximately 10 um). A cellulose
acetate filter was then gently dredged through a small quantity (less than 1
mg) of powder placed on a microscope slide. This procedure produced a thin and
almost imperceptible coating on the filter in order to limit the thickness and
thus self-absorption. S-NEXFS spectra of sulfate standards were collected in
bulk mode. Self-absorption must be carefully controlled when measuring
fluorescent X-rays from thick specimens; however, the effects of self-
absorption are limited to the region of the spectrum above the K-edge. In our
repeated measurements, the post-edge features were consistent and
reproducible, which allows discrimination of different sulfate standards.
 
Sampling and analytical procedures: S compounds and minerals were obtained
from chemical supply houses or mineral dealers. See papers cited below for
details.
 
Instruments: X-ray fluorescence microscope located at beamline 2-ID-B at the
Advanced Photon Source, Argonne National Laboratory. The beamline is optimized
to examine samples over a 1\\u20134 keV energy range using a focused X-ray beam
with a spot size of approximately 60 nanometers squared . The energy was
calibrated using an elemental sulfur standard. The whiteline energy of the
elemental sulfur standard was aligned to 2472 eV.
 
Data processing: S-NEXFS data were normalized to create a relative intensity
value of approximately 1 for post-edge area of the spectra. The data were also
processed using a three-point smoothing algorithm built into the software
package Athena to remove high-frequency noise (Ravel and Newville, 2005).";
    String awards_0_award_nid "753301";
    String awards_0_award_number "OCE-1357375";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1357375";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "Henrietta N Edmonds";
    String awards_0_program_manager_nid "51517";
    String cdm_data_type "Other";
    String comment 
"Sulfur NEXFS Standards 
  PI: Ellery Ingall (GA Tech) 
  Version date: 22-Feb-2019";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2019-02-22T17:35:30Z";
    String date_modified "2019-03-29T19:26:39Z";
    String defaultDataQuery "&time<now";
    String doi "10.1575/1912/bco-dmo.756682.1";
    String history 
"2022-08-17T23:23:59Z (local files)
2022-08-17T23:23:59Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_756682.das";
    String infoUrl "https://www.bco-dmo.org/dataset/756682";
    String institution "BCO-DMO";
    String instruments_0_dataset_instrument_description "X-ray fluorescence microscope located at beamline 2-ID-B at the Advanced Photon Source, Argonne National Laboratory: The beamline is optimized to examine samples over a 1–4 keV energy range using a focused X-ray beam with a spot size of approximately 60 nanometers squared . The energy was calibrated using an elemental sulfur standard. The whiteline energy of the elemental sulfur standard was aligned to 2472 eV.";
    String instruments_0_dataset_instrument_nid "756694";
    String instruments_0_description "Instruments that generate enlarged images of samples using the phenomena of fluorescence and phosphorescence instead of, or in addition to, reflection and absorption of visible light. Includes conventional and inverted instruments.";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB06/";
    String instruments_0_instrument_name "Microscope-Fluorescence";
    String instruments_0_instrument_nid "695";
    String instruments_0_supplied_name "X-ray fluorescence microscope";
    String keywords "ammonia, ammonium, Ammonium_Sulfate, barite, bco, bco-dmo, biological, chemical, chemistry, concentration, copper, Copper_II_Sulfate, data, dataset, dmo, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, energy, erddap, gypsum, iii, iron, Iron_Ammonium_Sulfate, Iron_III_Sulfate, jarosite, magnesium, Magnesium_Sulfate, management, mole, mole_concentration_of_ammonium_in_sea_water, nh4, ocean, oceanography, oceans, office, potassium, Potassium_Sulfate, preliminary, science, sea, seawater, sodium, Sodium_Sulfate, sulfate, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "https://www.bco-dmo.org/dataset/756682/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/756682";
    String param_mapping "{'756682': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/756682/parameters";
    String people_0_affiliation "Georgia Institute of Technology";
    String people_0_affiliation_acronym "Georgia Tech";
    String people_0_person_name "Ellery Ingall";
    String people_0_person_nid "645498";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Shannon Rauch";
    String people_1_person_nid "51498";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "Aerosol P";
    String projects_0_acronym "Aerosol P";
    String projects_0_description 
"NSF Award Abstract:
Primary nutrients, such as nitrogen and phosphorus, are critical for all life on earth, and limited quantities in the marine environment can inhibit primary productivity. Atmospheric aerosols are a significant source of these nutrients to nutrient-poor ocean regions, such as the phosphorus-limited Mediterranean Sea. The availability of phosphorus in aerosols has traditionally been linked to the composition and abundance of different phosphorus phases present. Unfortunately, investigating phosphorus composition in aerosols has been challenging due to methodological limitations until recently. In this study, researchers from Georgia Tech will use a new technique known as synchrotron-based P Near Edge X-ray Fluorescence Spectroscopy, in conjunction with X-ray fluorescence microscopy, to examine the diversity of aerosol phosphorus phases delivered to the Mediterranean Sea. By defining the relationship between air mass source region, aerosol composition, and bioavailability, results from this work will improve current knowledge of the factors regulating productivity in the Mediterranean Sea and help to clarify the potential response of this region to different climate change scenarios.
Broader Impacts: In addition to the valuable insights this project will provide on the controls on productivity and nutrient cycling in the Mediterranean Sea, this study will further education of young scientists, broaden participation of under-represented groups in ocean science, and enhance research infrastructure.";
    String projects_0_end_date "2018-07";
    String projects_0_geolocation "Mediterranean";
    String projects_0_name "P-NEXFS investigation of the influence of aerosol phosphorus on the Mediterranean Sea";
    String projects_0_project_nid "753302";
    String projects_0_start_date "2014-02";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Sulfur Near Edge X-ray Fluorescence Spectroscopy Data for standard materials.";
    String title "Sulfur Near Edge X-ray Fluorescence Spectroscopy Data for standard materials";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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